Vehicle brake actuator and electromechanical brake
AssigneeZF Active Safety GmbH
InventorVolker Knop
Life of this patent
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Abstract
The disclosure relates to a vehicle brake actuator and an electromechanical brake. The vehicle brake actuator comprises a brake housing, a spindle drive which is arranged in the brake housing and which has a spindle and a spindle nut mounted on the spindle, and a brake piston and a pot sleeve. The brake piston is movable between a retracted and a deployed position in order to apply a brake pad to a brake rotor. The brake piston is at least partially guided in axially displaceable fashion in an interior space of the pot sleeve. The pot sleeve has a base and is pushed in its longitudinal direction into the brake housing and is mounted radially therein.
Claims18
A vehicle brake actuator for an electromechanical brake, comprising:
- a brake housing, having a spindle drive which is arranged in the brake housing and which has a spindle and a spindle nut mounted on the spindle, and a brake piston, which is movable between a retracted and a deployed position in order to apply a brake pad to a brake rotor, and having a pot sleeve, in an interior space of which the brake piston is at least partially guided in axially displaceable fashion, wherein the pot sleeve has a base and the pot sleeve is pushed in its longitudinal direction into the brake housing and is mounted radially therein, and wherein the spindle is supported axially on the base of the pot sleeve via a spindle bearing configured to accommodate radial reaction forces;
- and wherein the spindle bearing includes a bearing contact surface of spherical shape, and wherein the spindle has a transition portion between a shank portion and a drive shaft projection, the bearing contact surface bearing against a complementary contact surface on the transition portion.
A vehicle brake actuator for an electromechanical brake, comprising:
- a brake housing having a spindle drive which is arranged in the brake housing and which has a spindle and a spindle nut mounted on the spindle, and
- a brake piston, which is movable between a retracted and a deployed position in order to apply a brake pad to a brake rotor,
- wherein the brake piston has a pot sleeve, in an interior space of which the brake piston is at least partially guided in axially displaceable fashion,
- wherein the pot sleeve has a base and the pot sleeve is pushed in its longitudinal direction into the brake housing and is mounted radially therein,
- wherein the spindle is supported axially on the base of the pot sleeve when the brake is actuated,
- wherein a spindle bearing with a bearing contact surface is arranged between the base of the pot sleeve and the spindle, which spindle bearing is configured to accommodate radial reaction forces when the brake is actuated,
- wherein the spindle has, at a brake pad side, a shank portion of thickened cross section, which on an outer shell has a screw mechanism of the spindle drive, and has a drive shaft projection of smaller cross section in relation to said shank portion, and has a transition portion between the shank portion and the drive shaft projection, wherein the bearing contact surface of the spindle bearing bears against a complementary contact surface on the transition portion, and
- wherein the bearing contact surface of the spindle bearing and the contact surface of the transition portion are of spherical shape.
Dependencies are inferred from the claim text.